Selecting apparatus for electric telegraphs



July 10, 1928.

c. L. KRUM ET AL SELECTING APPARATUS FOR ELECTRIC. TELEGRAPHS Original Filed Dec. 23. 1919 Patented July 10, 1928.

UNITED STATES PATENT OFFICE.

CHARLES L. KRUM AND HOWARD L. KRUM, OF CHICAGO, ILLINOIS, ASSIGNORS TO MORKRUM-KLEINSCHMIDT CORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

SELECTING APPARATUS FOR ELECTRIC TELEGRAPHS.

Original application filed December 23, 1919,8eria1 No. 346,948. Patent No. 1,635,486. Divided and this application filed November 4, 1926. Serial No. 146,212.

The present application is a division of the prior application filed by us in the United States Patent 'Oflice .December 23, 1919, Serial No. 346,948'Patent No. 1,635,486.

The improvement relates to selecting apparatus for telegraphs and more particularly for printing telegraphs which employ a definite interval or unit code made up of permutations of two different line conditions extending through a definite number of successive time intervals or .units. The receiver selector mechanism for such telegraphs usually comprises a set of selectors correspond: ing" in number to the selecting intervals or units of the signal, and which are condilioned or set in different combinations in accordance with the code permutations.

The present invention seeks to provide a simple selecting apparatus in which the selectors are conditionedor set in different combinations under the joint mechanical control of a rotary, motor driven shaft, or its equivalent, and the armature of a single magnet Which is responsive to the code permutations either of positive and negative or of current and no current units. To this end the invention comprises a selector setting .01 conditioning member which is 1'0- tated by a motor driven shaft or the equivalent through a seriesof operating positions corresponding in number to the selectors and which is shifted axially by the armature of the controlling magnet to thereby variably control the selector conditioning or setting operations. A preferredvform of the inven- 131011 is hereinafter more fully set forth and illustrated in the accompanying drawing, and the invention is more particularly defined in the appended claims.

In the drawing:

Fig. 1 is a view in elevation of the improved selecting apparatus, parts of the supporting frame being shown in section.

Fig. 2 is a front elevation, and Fig. 3 is a rear elevation of parts shown in Fig. 1.

The improved selecting apparatus is under the joint-mechanical control of a rotary,

motor driven shaft 10 and an electro-magnet 11. The shaft 10 is journaled in suitable plates or brackets 12 (only oneof which is shown). It is continuously rotated duringeach complete selecting operation, prefer-ably by means of a motor driven start and in operation in response to a starting interval or unit preceding the selecting inter vals of each signal and is arrested in're' sptlmse to spacing intervals betweenthe signa s. r

The magnet 11 is suitably. mounted on the bracket 12 and its armature 13 is mounted on a vertical spring-held lever 14 pivotally mounted at its lower end. In the form shown, the armature lever is provided with a fork 15 at its upper end and pins 16 thereon engage an annular groove of a shuttle or selector actuating member 17 that is keyed to'and axially shiftable on the shaft 10. An arm 18 on the shuttle 17 is provided with a beveled cam 19 which is rotated past the forward ends of a series of "selector members '20 and is moved into and out of operative relation with the latter as the circuit of the magnet is opened and closed.

The selector members 20 are mounted on the bracket 12 in a circular series about the axis of the shaft 10 and these members are preferably in the form of longitudinally movable pins mounted in bushings 21 that are seated in openings formed. in the bracket 12.

Preferably, as fully set forth inparentapplication, the pins 20 serve to. shift orposition a set of selectors in the form of longitudinally movable plungers 22, which in turn .control the printing operations. The rear ends of these plungers extend through a plate 23 fixed to the upper end of the bracket 12 and engage the upper ends of a series of levers 24. The latter are pivotally mountedbetween their ends on studs 25 fixed to and projecting rearwardly from the'plate 12, and the lower ends of the levers are eng aged by the rear headed ends of the pins 20.

or the sake of clearness only one plunger,

lever, andpin are shown in Fig. 1.

The shaft 10, as stated,'is cont nuously advanced in the direction indicated by the arrow in Fig. 2,'during each selecting operthe mid-portions of the selecting intervals of the signals. During eachsuch interval the circuit of the magnet 11, which responds to the signals, is either opened or closed to thereby effect the axial movement of the shuttle or selector actuator 17 either to its operative or inoperative'position, so that as it moves past each selector pin the latter will either be shifted rearwardly to thereby advance the corresponding selector plunger 22 or remain in its forward position. In this way the selectors are set in difl'erent combinations during each signal period. Suitable means are provided, such as shown in the prior parent application, for restoring the selector plungers and pins to normal at the end of each operation.

The number of selector pins and plungers correspond to the numberof selecting intervalsusually fiveof the signals and the pins are angularly spaced to correspond to the mid-portions of the si nal intervals.

This spacing is uniform e cep't that the space between the end pins of the series is substantially greater to allow for the movement of the selector actuating member during the starting and spacing intervals of the signals.

If desired, the controlling magnet could be arranged to respond to positive and negative impulses instead of current and no cur- 7 rent intervals. Other changes may be made in the details set forth without departure.

from the scope of the invention as defined in the appended claims.

We claim as our invention:

1. A selector mechanism for electric telegraphs comprising a set of selectors, a rotatable, axially movable member for effecting the setting of said selectors, means for rotating said member and-a magnet for effecting the axial movements of said member to the received signals having an armature for mechanically effecting the axial movements of said members and thereby selectively determining the selector conditioning operations.

3. A selector mechanism for electric'tele graphs comprising a circularseries of selector members, a rotatable, axially movable selector actuator, a motor' driven shaft for continuously advancing said rotary member past said selector members in succession, and a magnet having an armature for me-' chamcally effecting the axial movement of said actuator into and out of shift said selector members. H I

4. A selector mechanism for electric telegraphs comprising a set'of selector members, setting means for said members, means position to for rotating'said setting means, and a single mechanical connections between the armature of said magnet and said actuator for selectively reciprocating the actuator transversely and into and out of position to condition said selectors.

6. A selector mechanism for telegraph receivers responsive to definite interval code signals having starting, selecting and spacing intervals, comprising a selector actuating member, a set of selecting elements arranged in a circulawseries and uniformly spaced except for the relatively greater spacing of the end elements of the series, a concentric, start-stop shaft for 'eflectinga relative rotary movement of said actuator and said selectors and a magnet responsive to receive-signals for vibrating said] actuator to thereby selectively control its selector-setting operations.

CHARLES L. KRUMJ HOWARD KR UM. 

